Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Centreline statistics of the small-scale turbulence of a circular jet and their dependence on high frequency noise

Xu Min-Yi Du Cheng Mi Jian-Chun

Centreline statistics of the small-scale turbulence of a circular jet and their dependence on high frequency noise

Xu Min-Yi, Du Cheng, Mi Jian-Chun
PDF
Get Citation

(PLEASE TRANSLATE TO ENGLISH

BY GOOGLE TRANSLATE IF NEEDED.)

Metrics
  • Abstract views:  3464
  • PDF Downloads:  682
  • Cited By: 0
Publishing process
  • Received Date:  11 May 2010
  • Accepted Date:  28 May 2010
  • Published Online:  15 March 2011

Centreline statistics of the small-scale turbulence of a circular jet and their dependence on high frequency noise

  • 1. State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China

Abstract: This study systematically investigates the statistics of the centreline small-scale turbulence of a circular jet issuing from a smooth contraction nozzle. Detailed velocity measurements were performed for the exit Reynolds number of Re=20100, where Re≡Ujd /ν with Uj being the exit mean velocity, d the nozzle diameter and ν the kinematic viscosity. After effectively filtering out high frequency noises, statistical properties of the small-scale turbulence were obtained appropriately; those properties include turbulence energy dissipation rate, Kolmogorov length scale, Taylor scale, turbulence Reynolds number, skewness and flatness of the velocity derivative. It is observed that these properties satisfy their self-preserving relations in the far field. It is also revealed that the small-scale turbulence reaches the self-preserving state earlier than does the large-scale motion. Besides, the smallest-scale turbulence depends least on the initial and boundary conditions and therefore behaves most universally across different flows.

Reference (19)

Catalog

    /

    返回文章
    返回